[PATCH 37/59] drm/i915: Apply headless DMC workaround for CNL

[Timo Aaltonen]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

BugLink: http://bugs.launchpad.net/bugs/1757573

With firmware 1.07 having fixed the state corruption issue, we can enable
the headless GT performance workaround for CNL as well. (Equivalent to
b68763741aa2 ("drm/i915: Restore GT performance in headless mode with DMC
loaded") on other affected platforms.)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100572
Testcase: igt/gem_exec_nop/headless
Cc: Imre Deak <imre.deak at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Dmitry Rogozhkin <dmitry.v.rogozhkin at intel.com>
Reviewed-by: Imre Deak <imre.deak at intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180111082417.795-1-tvrtko.ursulin@linux.intel.com
(backported from git://anongit.freedesktop.org/drm/drm-intel commit 6e7a3f5244356ce079457cb3cfbc58ca01c00a2e)
Signed-off-by: Timo Aaltonen <timo.aaltonen at canonical.com>
---
 drivers/gpu/drm/i915/intel_runtime_pm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index f1d2f58a7a37..22ec4de25a5d 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -1848,6 +1848,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 	BIT_ULL(POWER_DOMAIN_INIT))
 #define CNL_DISPLAY_DC_OFF_POWER_DOMAINS (		\
 	CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
+	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
 	BIT_ULL(POWER_DOMAIN_MODESET) |			\
 	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
 	BIT_ULL(POWER_DOMAIN_GMBUS) |			\
-- 
2.15.1